Top definition
A lingering smell.

When one eats peanut butter the smell of peanut butter sticks with them for a extended period of time even though all evidence of the peanut butter is gone.

Often related to other items of similar consistancy. (read:feces)
Example 1:
A dog does his business outside and comes in to sit beside you. The dog smells very much like his dirty business even though his anus is completely free from 'cling-ons'. This is the peanut butter effect.

Example 2:
One is doing laundry and notes the 'peanut butter effect' on a pair of underwear. The underwear may only inhibit a foul smell or may be accompanied by 'skid-marks' after being well used.
by Christine P. April 24, 2006
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug